1. Leibniz-Institut für Polymerforschung Dresden e.V; Hohe Straße 6 01069 Dresden Germany
2. Technische Universität Dresden; Center for Advancing Electronics Dresden (cfaed) and Chair of Organic Chemistry of Polymers; 01062 Dresden Germany
3. Materials Research Laboratory, Materials Department, and Department of Chemistry and Biochemistry; University of California; Santa Barbara CA 93106-2150 USA